Detector



Au 20,1929. w, A, PPS 1,725,128

- DETECTOR Filed Dec. 1927 2 Sheets-Sheet 1 S N N INVENTOR ATTORNE' Iii 4.00pm

DETECTOR Filed Dec. 3. 1927 W. A. CAPPS Aug. 20, 1929.

Patented Aug. 20, 1929.

UNITED STATES WILLIAM ALONZO CAIPS, F ERWIN, NORTH CAROLINA.

DETECTOR.

Application fiIed December 3, 1927. Serial No. 237,561.

This invention relates to devices of that class employed on looms for detecting streaks of thin places which are formed from the running out of the shuttle thread or for other reasons and has for its objects to provide a device of this character which is simple in construction, which may be readily attached to any type of loom and which will operate instantly when a thin place in the cloth being woven passes thereunder to stop the loom and prevent damage to the loom.

Further objects are to insure evenness, to avoid faultiness of the work, and to provide 5 a construction which will eliminate to a great extent the wearing of the parts and consequent necessity of frequent repair.

Another object of the invention is to provide a device which is durable in construction and in which the parts subjected to the greatest wear may be readily replaced.

A further object is to provide in the con struction of the detector, means whereby the detector may be thrown back over the breast beam when it is desired to change the warp or for other purposes and which may be latched against incidental displacement from the work.

A further object is to prevent damage or interference with the weft hammer and to avoid weakening of the operative parts.

Other objects and advantages Will appear hereinafter in connection with the following specification and claim and it will be understood that various changes in the form, pro portion, size and details of the structure may be made without departing from the spirit of the invention and I do not Wish to be limited in the scope of my invention except as I shall be limited by the said claim.

In the accompanying drawings Figure 1 is a plan view showing the invention connected to a breast beam and in co-operative relation with the weft hammer and trip lever.

Figure 2 is a section on line 22 of Fig ure 1 further illustrating the relation of the parts.

Figure 3 is a detail view of the trip lever in connection with certain of the parts constituting the subject matter of the invention, the view being a section on line 33 of Figure 1.

Referring to the drawings in detail by reference numerals, the same numerals designating the same of the drawings, .10 designates the breast beam of the loom, 11 is a strip of cloth in course of weaving, 12 is a trip lever, 13 is a weft hammer and 14 is a detector rod journaled upon the breast movement relative thereto by means of brackets 15 connected with the breast beam. The detector rod is provided at its ends with arms 16 and 17 lying at right angles thereto and extending in the samedirection therefrom, the arm 16having an upwardly bent portion 16 provided with an eye 16 at its upper end for a purpose which will presently appear. The arm 17 is provided at its free end with a right on which is mounted the detector 18 in the form of a wire finger 19, the lower end of which is adapted to rest on the cloth adjacent the fell, the point being spaced from parts in the several figures beam for angular angle turn 17 the edge of the weft not more'than 2 or 3 threads.

Connected with the trip lever 12 is a supplemental arm 20 which may be detachably secured thereto by means of screws '21 or:

may be permanently connected therewith as desired, the lever 12 being pivotally connected at 12 to a suitable support or axle 22 and having its outer end 12 adapted to move in a path of suitable mechanism to contact the same for throwing the loom out of gear and stopping the operation thereof, such mechanism being no part of the present invention and being well known in the art is not here illustrated.

Pivoted to the end of the supplemental arm 20 is a trip plunger 23 having an eye 23, adapted to receive therethrough a projection 20* extending from the supplemental arm 20 and to rest against the shoulder 20 formed on saidsupplemental arm, the trip plunger being removably and rotatably held on said supplemental arm by any suitable means as by a cotter pin 24. The rear end 23 of the trip plunger is provided on its lower surface with a shoulder 25 for a purpose which will presently appear.

The trip plunger is preferably in the shape of a rod adapted to have sliding connection through the eye l6 formed on the end of the arm 16 to provide for a certain amount of play between these two parts. The weft hammer is provided with a trip head 26 preferably detachably mounted thereon by means of nuts 27 or by any other means and is provided with a substantially hook shape upper end including an inclined bent portion 28, the upper end of which lies beneath the rear end 23 of the trip plunger 23. Adjacent the arm 17 of the detector rod, I provide a latch member 29 secured to one of the bolts of the adjacent bracket 15 and adapted to overlie the arm 17 in one position thereof to prevent too great an upward accidental movement of the arm of the detector member and disengagement thereof from the work. The latch further holds the rod steady and maintains the same in the proper relation to the cloth. Said latch member, however, may be manually removed from its latching position to permit the detector rod to be thrown backward over the breast beam for changing the warp.

The operation of the device is briefly as follows: When no thin places occur in the cloth being woven, the same will move under the finger l9 and the detector rod will remain substantially stationary except for a slight movement caused by the vibration of the loom, but when a thin place passes under said finger, the arm 17 will move downwardly carrying with it the arm 16 and the trip plunger 23 bringing the portion 23 thereof into contact with the upper end of the trip head 26 and upon a forward movement of the weft hammer, the upper end of the trip head will contact withthe shoulder 25, causing the lever 12 to be rocked on its axle 12 bringing the end 12 thereof into contact with mechanism for stopping the loom. By the above construction, all

parts of the loom ordinarily damaged by mechanism for stopping the loom, is avoided and the usual constant repair is done away with and the-consequent faultiness of work due to worn parts is eliminated and neither damage to the loom nor to the cloth will occur.

Having described my invention what I claim is A thin place detector for a loom comprising a rod, brackets pivotally securing said rod with respect to the breast beam of the loom, arms formed with the ends of the rod, a detector finger carried by one arm, a latch member secured to the securing means of one bracket to hold the finger carrying arm in operative position, an eye formed with the other arm, an arm having a shoulder and secured to the trip lever of the loom, a plunger rod pivoted to the last mentioned arm and engageable with the shoulder formed therewith, said plunger rod having a free end recessed on its bottom to form a shoulder, a trip head secured to the weft hammer of the loom and having its upper end bent in hook formation in a manner to provide an inclined portion disposed to engage the shoulder of the plunger rod when the plunger rod is lowered by the eyed arm for disposing the shoulder of the plunger rod in the path of the inclined portion whereby the plunger rod will be moved thereby for moving the trip lever in the path of stopping mechanism for the loom.

In testimony whereof I affix my signature.

WILLIAM ALONZO CAPPS. 

